Summer chicken and vegetable casserole

When I used to go camping with friends this is one of the dishes that I cooked for a large group. It's a great one pot dish, which it kind of had to be as I only had one pot and a two ring camping burner. Its also light and summery with lots of seasonal ingredients which are at their best this time of year. It doesn't require much in the way of effort to make which some of you will be happy to hear.